What Influences the Sample Size? We examine the effect of different inputs on determining the sample size needed to obtain a specific margin of error when finding a confidence interval for a proportion. Find the sample size needed to give a margin of error to estimate a proportion within 5%5% with 99%99% confidence. With 95%95% confidence. With 90%90% confidence. (Assume no prior knowledge about the population proportion p.) Round your answers up to the nearest integer. Do not use commas.

Confidence	Sample Size
99%99%:	Enter your answer; Confidence 99%, Sample Size
95%95%:	Enter your answer; Confidence 95%, Sample Size
90%